Safety-razor.



SAFETY RAZOR. APPLICATION FILED MAY 31 Patented Mar. 4,1919.

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" vii FREDERICK S. DEITRICK, OF CAMBRIDGE, A

ND EMILE C. FRANZMANN, OFSOIVIERVILLE,

SAFETY-RAZOR.

Lgl'?. Specication of Application led May 31,

To all whom t may concern Be it known that we, FREDERICK S. DarrnIoK and EMILE C. FRANZMANN, citizens of the United States of America, and residents of Cambridge and Somerville, respectively, both in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Safety Razors, of which the following' is a specification.

This invention relates to cutting'devices and more particularly to safety razors. The

. principal objects of the invention are to provide a device of this character which is adapted to use blades of different styles, having either single or double edges, which is adapted to clamp a blade inoperative position quickly and firmly and to clamp a doubled edged blade 'in such position that either edge may be utilized with safety, which preferablvhas no threaded connections, which is neat and attractive in appearance, and which is relatively .inexpensive to manufacture. Other objects are to provide a honing .or stropping attachment, which is preferably employed in conjunction with the razor and which is adaptedto accommodate either single-edged or doubleedged blades.

Still further objects of the invention will be apparent from the following description taken in connection with the accompanying drawings, in which,-

Figure 1 is a side elevation of one embodiment of the invention, showing a singleedged blade in operative position;

Fig. 2 is a top plan view of the device shown in Fig. 1, a portion being broken away;

Fig. 3 is a side elevation of a portion of the device viewed from the left of Fig. 1, part-s being broken away;

Fig. 4 isa vertical transverse central section through the device showing parts in elevation l Fig. 5 is atransverse section taken on line 545 of Fig. 3, showing the means for locking the parts inposition;

Fig. 6 is a top plan view of the lst-ropping attachment; l

lfig. 7 is a transverse section taken on line 7 7 of Fig.' 4, showing a single-edged blade in position in the stropping attachment; and

Letters Patent Patented Mair. 4l, 1919.

1917. Serial No. 171,967.

Fig. 8 is a transverse section taken on line 8-8 of Fig. 4, showing a double-edged blade in position in the strapping attachment.

lThe particular embodiment of our invention, chosen for the purpose of illustration, comprises a handle 1, upon the upper end of which is mounted a guard member 2 having two operating edges provided with rows of teeth 3 and 4, respectively, a blade positioning means 5, a blade'holding means 7, a locking arm 8 mounted on the holding member 7, and cam members '9 mounted inside of the handle 1 in such manner as to coperate with cam slots 11 vin the locking arm 8 in a manner hereinafter to be described. 1While the handle 1 may be of any suitable contour and construction in the broader aspect of the invention, it is preferably hollow, as indicated, so that the locking arm 8 which coperates with the handle to lock the parts inoperative position may extend into the handle, thereby to make the device more compact.

A cardinal feature of the invention consists in the functional relationships between the guard member 4, the positioning means 6 and the holding member 7.' The guard member 4 is preferably convex transversely, although it may, if desired. be made flat on its upper surface. The holding means 6 is disposed over the guard member adjacent one of the rows of teeth, namely, the row 3. The primary function of the holding means is to position a blade in operative relationship to the row of teeth 3y In the preferred embodiment of the invention the .means is so arranged that either a singleedged blade, Vsuch as shown at 12 in the figures, or a double-edgedblade lying surface of the guard member may be held in operative relationship to the teeth. To this end the outer side of the positioning means 6 is preferably imity to the surface of the guard member near the row of teeth 3, the space between the outer edge of the holding means and the guard member being preferably a little more than suiiicient to permit a thin blade to be inserted therebetween. The shape of the positioning means back 'of the forward edge is ofllesser importance, but in the preferred embodiment the said portion made disposed in close proX- along the substantially flat and is disposed obliquely with respect to the surface ot the guard membeig'as shown in Figs. 1 and 4.

As shown in the drawings, the holding means 6 is in the form of a flat band or strap and is mounted at its opposite ends to the guard member 2 by means otears 13. Frojections 10 are preferably provided on the lower side of member 6 tor the blade to bear against when employing a singleedged blade. ln the illustrated embodiment of the invention the projections 10 are formed by indenting the member 6 at suitable points. Stops 5 may if desired be disposed at the ends of the guard member in front of the strap 6 to limit the forward movement ot the single-edged blade when inserted under strap 6.

In order to hold a double-edged blade in position the holding member 7 is provided with a portion 1-1 disposed on the right-lrand side (Figs. l, 2 and 4c) of the longitmlinal central region oic the guard member Q so as to clamp the blade between this member and the guard member on the right-hand side, the blade being held against the guard member on the left-hand side by the outer edge of the strap G. In order to adapt the holding member 7 to hold a single-.edged blade in position it is provided with a portion 9 on the left-hand side ot the longitudinal eentral region of the guard member, this portion extending into operative relationship with the single-.edged blade 12 so as to hold the blade against the positioning means (l when in the normal position shown in Figs. 1 and 4. The portion 1G is preferably provided with a flat surface 17 so disposed as to bear against the blade 12 throughout its entire width. The portion 16 also extends u pwardly from the guard member 2 to permit the holding member 7 to be rotated about the longitudinal central region of the guard member as will be hereinafter described.

In order to act-nate the holding member 7 and maintain it in operative position, the locking arm S is preferably so mount-ed .in the (renter of the lower tace of the member 7 as to extend into the upper portion et theA hollow handle 1. A slot 1S is provided at one side of the upper portion of the handle 1, and the locking arm 8 is so curved that its lower end projects slightly out oill the han.

dle 1 when in operative position. Owing to the fact that the port-ion 1G ol the holding member 7 extends ujjm'ardly i'rom` the guard member, the holding member 7 and the loching arm 8 may be swung outwardly into the broken line position shown in Fig. 1 so that the locking arm 8 extends outwardly through the slot 18 in the handle 1. The cam members 9, which are preferably formed by striking up portions of the handle 1, have sloping portions 19, horizontal portions 21. and de pending portions 22.

When the locking arm 8 is swunginwardly from the position shown in dot and dash lines in Fig. 1 to the normal position the slots 11 on oppositesides of the locking arm S engage the inclined portions 19 of the cam members 9, thereby drawing the holding member 7 downwardly against the guard member 2. Then using a doubleedged blade this serves to tiex the blade in the wellknown manner and force it into substantial parallelism with the convex guard member. The horizontal portions 21 ko3t the cam members 9 are provided to hold the locking arm in normal position, as shown for example in Figs. 1 and l, and the depending portions 22 are provided to limit the inward movement of the locking arm, these portions being arranged to engage the inner side of the locking arm just below the slots 11.

Then it is desired to use a double-edged blade the arm 8 is swung outwardly into the broken line position shown in Fig. 1 and then withdrawn upwardly from the upper end of the hollow handle. The double-edged blade is then placed in position on the guard member with the centra-l opening ordinarily provided therein in alinement with the hollow handle. The arm S is then inserted through the opening in the blade into the broken line position shown in Fig. 1. rl`he arm is then swung inwardly by pressing inwardly on the lower end thereof into the operative position shown in Fig. sl. ln order more positively to position the holding niember 7 on the guard member and more eurely to position the double-edged blade on the guard member, pins 23 are provided on the holding member on opposite sides of the arm 8 so as to project through openings 2T in the guard member in the well known manner. The openings 24 are so shaped as to permit slight movement of the pins there in when the holding member 7 is rotated about the longitudinal central region ot the gua-rd member.

The stropping attachment, forming a part of the present invention, comprises a tubular holder 31 having an enlarged portion 32 adapted to fit snugly Within the lower end of the handle 1, as shown in Fig. 4, and having a portion 33 of slightly larger diameter on its lower end, the portionv 33 preferably being of such internal diameter as snugly to fit over the lower end of the handle 1. By virtue of this arrangement the stropping attachment may nor-` mally be carried in the position shown in Figs. 1 and 2, and when it is desired to use the attachment for stropping purposes it may be withdrawn from the handle, reversed and fitted over the handle so that the handlel oit the razor may also be employed as a handle for the stropping attachment. The upper portion of the tubular stropping attachment is preferably split along a central igaesgeve llr'mgitiulinal plane so as to provide slots 34 and 36 on opposite sides thereof. For the lpurpose of holding a blade of the type shown4 in Fig. 7, or of any type of singleedged blade, the rear portion of which is relatively thick, guides 37 are preferably provided on the inside of the tubular attachment on opposite sides of the slots 34 and 36, the preferred method of providing these guides being to strike up lugs from 'the walls of the tubular members as shown in the drawings. In order to hold a doublefedged blade in the stroppng attachment a spring member 38 is provided, the member 38 being disposed within the attachment on one side of the plane of the slots 34 and 36 and being mounted uin any suitable manner as indicated for example at 39. Projections 4l are preferably provided on the member 38 to cooperate with the holes ordinarily provided near the ends of the double-edged blade, the projections 41 being spaced apart a dist-ance equal to the distancebetween the holes inthe blade.

When employingthe stropping attachment-tostrop a single-edged blade of the type shown in Fig. 7 the thick rear portion of the blade is inserted through the opening 42 (Fig. 6) in the upper end `of the attachment and forced downwardly until the blade is wholly within the slot 34. By suitably positioning the lugs 37 the blade may be held rigidly in this position, and if desired the lugs may be made of such length as to have some flexibilityso as yieldingly to engage the opposite sides of the thick portion of the blade. a. double-edge ;l blade of the character shown in Fig. 8 for example, the blade is inserted into the attachment from the top in the same way as a single edge blade, the blade being passed into the attachment until the lugs 4l are forced into the spaced openings in the blade by the elasticity of the spring member 38. Thus a double-edged blade is firmly held in position by means of the lugs 4l, whilethe single-edged blade is held in position largely by virtue of the lugs 37, although it is obvious that the pressure of the projections 4l against the single-edged blade when in the position shown in Eig. 7 tends to assist in n'iaintaining the blade in position. In introducing the blade of either type into the holding attachment theprojections 4l may be moved out of the path of the blade bv pressing` the end 44 of the member 38 outwardly.

Y I claim:

A' l. A safety razor comprising a doubleedged guard member, and means for holding a blade in position on the guard member, Jfhexholding means having two blade engaging' surfaces adapted to be used inde- When it is desired to stroppendently to hold a blade inoperative position with respect to one edge of said guard.

A safety razor comprising a doublei edged guard member, and means for holding a blade in position on the guard me1nber, the holding means having a surface for engaging a single-edgedbladc to hold the blade in operative position relatively to one edge of said guard and haring another surface for vengaging a doublc-cdged blade to hold the blade in operative position relatively to both edges of said guard.

3. A safety razor comprising a guard member, and means for holding a blade on the guard, said holding means having an inner surface adapted to clamp a thin flexible blade against the guard and having an outer surface adapted `to engage a relatively thick blade, whereby either a thin flexible blade or va relatively thick blade may be employed.

4. A safety razor comprising a doubleedged guard member, and means for holding a blade in position on the guard member, said holding means having a lower surface adapted to clamp a double-edged blade against the guard with the cutting edges in operative position to the respective edges 'of the guard and having an upper surface adapted to engage a single-edged blade to hold the blade in operative relationship to one edge of the guard, whereby either a double-edged or a single-edged blade may be employed.

5. A safety razor comprising a guard member, a cap member disposed aboveithe guard member, a hollow handle for the guard member, a handle for the cap member extending into the guard handle, and coperating locking means on the two handles so arranged that when the cap member is rotated about a longitudinal region of the guard member to clamp a blade between the two members the locking` means on the handles` cooperate to lock the parts in operative. position.

6. A safety razor comprising a guard member, a cap member disposed above the guard member and having a portion disposed on one side of the longitudinal central region of the guard member so that the cap n'lember may be rotated about said region to move said portion to and from the guard member, handles extending in juxtaposition from said mem bers respectively, and locking means on the handles so arranged that when said portion of the cap member is rotated into juxtaposition to the cap member to clamp a blade between the two members the locking means on Vthe handles lock the members in operative position.

7. A safety razor comprising a guard member, a cap member disposed above the guard member and having a portion disposed on one side of the longitudinal central region of the guard member so that the cap member may be rotated about said region to move said portion to and from the guard member, a hollow handle on the guard member, a locking arm extending into said handle from the cap member, cams disposed on the handle and arm respectively so as to lock the parts in operative position when the cap member is rotated into juxtaposition to the guard member to clamp a blade between the two members.

8. A safety razor comprising a guard member having teeth along one side, means disposed above the guard member in close relationship to said teeth forengaging the upper side of a blade, a member mounted to rotate about the longltudinal central region of the guard member to engage the blade on the under side and hold it against the said means.

9. A safety razor comprising a guard member having` teeth along one side, a positioning member disposed above the guard member along said teeth so that a blade may be positioned between the two members with its forward edge disposed over said teeth, a holding member rotatably mounted behind said positioning member so as to engage the blade and hold it in position against the positioning member, and locking members connecting with the guard and holding members respectively to lock the parts in operative position when the holding member is rotated into operative position.

l0. A safety razor comprising a guard member having two guard edges, blade positioning means disposed over the guard member adjacent one of the guard edges to hold a blade in operative position with respect to said one of the guard edges, and a blade holding member arranged to be rotated about the longitudinal central region of the guard member, the guard member being so shaped that, when rotated into normal position, it will clamp either a double-edged blade between said two members in operative relationship to the two edges of the guard member or a single-edged blade between the holding member and positioning means in operative relationship to said one guard edge.

11. A safety razor comprising a guard member having two guard edges, blade positioning means disposed over the guard member adjacent one of the guard edges so that a straight blade may thereby be positioned in oblique. relationship to the guard member and in operative relationship to said one of the guard edges, a blade holding member disposed over the guard member, the holding member having a portion on the side of the longitudinal central region of the memorie guard member opposite to said one of the guard edgesso arranged that a double-edged blade may be held beneath -said positioning means and said holdingy member withV its edges in operative relationship vto the two guard edges, and the holding member having a portion on the other side of said longitudinal central region extending upwardly from the guard member so as to engage the under side of a single-edged blade and hold it against saidpositioning means with its cutting edge in operative relationship to saidone of the guard edges, whereby either a single-edged or a double-edged blade may be employed.

12. A safety razor oon'iprising a guard member havingW two guard edges, blade positioning means disposed over the guard member adjacent one of the guard edges so that a straight blade may thereby be positioned in oblique relationship to the guard member and in operative relationship to said one of the guard edges, a blade holding member disposed over the guard member, the holding member having a portion on the side of the longitudinal central region of the guard member opposite to said one of the guard edges so arranged that a double-edged blade may be held beneath said positioning means and said holding member with its edges in operative relationship to the two guard edges, and the holding member having a portion on the other side of said lonO-itudinal central region extending upwardly from the guard member so as to engage the under side of a single-edged blade and hold it against said positioning means` with its cutting edge in operative relationship to said one of the guard edges, whereby either a single-edgedy or a double-edged blade may be employed, and means extending through the guard member for rotating the holding member about said longitudinal region to move the holding member into and out of operative position.

13. A safety razor comprising a guard member having two guard edges, blade p0- sitioning means disposed over the guard member adjacent one of the guard edges so that a straight blade may thereby be positioned in oblique relationship to the guard member and in operative relationship t0 said one of the guard edges, a blade holding member disposed over the guard member, the holding member having a portion on the side of the longitudinal central region of the guard member opposite to said one oi. the guard edges so arranged that a double-edged blade may be held beneath said positioning means and said holding member with its edges in operative relationship to the two guard edges, and the holding member having a portion on the other side of said longitudinal central region extending upwardly from the guard member so as to engage the under side of a single-edged blade and hold it against said positioning means With its cutting edge in operative relationship to said one of the guard edges, whereby either a single-edged or a double-edged blade may be employed, a handle on the guard member, a looking arm extending from the holding member into juxtaposition to the handle, oo-

operative looking means on the handle and arm respectively arranged automatically to look the holding member in operative position When the holding member is rotated into normal position.

Signed by us at Boston,

this twenty-sixth day of May, 1917.

FREDERICK S. DEITRICK. EMILE C. FRANZMANN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

Massachusetts, 15 

